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United States Patent | 5,242,157 |
Bonenberger ,   et al. | September 7, 1993 |
Impact damper for motor vehicles, the impact damper having two tubes which can be pushed one inside the other, the inner tube having a first and second fluid chamber and a gas chamber separated from the fluid chamber by a separating piston. A third fluid chamber is located behind a work piston and the tubes can be retracted or extended by changing the pressure within the fluid chambers of the impact damper.
Inventors: | Bonenberger; Hartmut (Puchheim-Nord, DE); Kirchner; Holger (Ruppichteroth, DE); Wagner; Kurt (Munchen, DE) |
Assignee: | Boge Aktiengesellschaft (Eitorf, DE) |
Appl. No.: | 763937 |
Filed: | September 23, 1991 |
Sep 22, 1990[DE] | 4030035 |
Current U.S. Class: | 267/64.26; 188/316; 267/64.28; 267/116; 293/134 |
Intern'l Class: | F16F 009/43; B61G 011/12 |
Field of Search: | 267/116,119,130,126,127,64.26,64.28 188/269,281,314,316,317 293/133,134 |
3533613 | Oct., 1970 | Bendicsen | 267/64. |
4029304 | Jun., 1977 | Sakaguchi et al. | 267/116. |
4078638 | Mar., 1978 | Koyama et al. | 267/116. |
4641872 | Feb., 1987 | Lohr et al. | 293/133. |
4719941 | Jan., 1988 | Moser | 137/599. |
4854554 | Aug., 1989 | Ludwig | 267/64. |
4988081 | Jan., 1991 | Dohrmann | 267/64. |
Foreign Patent Documents | |||
3419165 | Nov., 1985 | DE. |